Can I tell a little story on this topic, since you brought it up? When I was really into marathon training, I weighed myself fairly regularly. One day I got up and weighed myself. I was a little startled at the weight as it was surprisingly higher than the previous week but not much had happened that week. So a little while later, I felt pretty terrible and an urgent need to go to the bathroom. Afterwards I had the high 5 feeling you noted above. A little while later, I had the same sudden urge to go to the bathroom followed by ANOTHER high five moment. I could not resist the urge to measure since the scale was right there.

Total difference between something like 7am and 10am and two trips to the bathroom? 9 pounds. My wife remains unimpressed by this feat and appalled that I am proud of it and tell it to people.